混合电位下的法拉第导纳

ON THE FARADAIC ADMITTANCE AT MIXED POTENTIAL

在过去对单个电极反应的法拉第导纳表达式的讨论的基础上,进一步讨论了有两个电极反应同时进行而状态变量(包括电极电位E在内)的个数不超过3个时混合电位下的法拉第导纳表达式及等效电路,特别注意讨论了混合电位是腐蚀电位的情况。

On the basis of the equations of faradaic admittances deduced previously for single electrode reaction whose rate is controlled by two or three state variables, the faradaic admittance for the case of two electrode reactions taking place simultaneously at a mixed potential is discussed. The discussion is confined to the case of the total number of the state variables (including electrode potential E) controlling the rates of the two electrode reactions being not over three. It is found that in certain cases, a phenomenon called 'degeneration' with the number of time constants of relaxation processes being less than that of the state variables can happen. Special attention is paid to the case of corrosion potential which is an important mixed potential.